One of the first roadside zomg-look-at-the-scenery pullouts at the northern end of Cape Disappointment State Park happens to overlook a wonderful example of what happens when sediment fills in the sea round a sea stack. Can you spot it?
This is the result when a nice, hard stack of basalt (in this case the Eocene Crescent Formation basalt) ends up in a sea of sediment instead of a sea of saltwater. Poor thing is now stuck inland. The only time it’ll be a stack again is either during a tsunami or if sea level rises.
There’s probably some technical term for these things. I thought it was “knocker,” but that seems to only refer to knobs of rock within a melange. And my brief attempt to wrestle an answer out of Google was non-successful. Who here knows what they’re technically called?
If there is no technical term, I call dibs on calling them “broodies,” just in case that catches on.